Clinical trials

What is a clinical trial?

A clinical trial is a research study that tests whether a new treatment, or a new use of an existing treatment, is safe and effective. Trials are how new treatments move from laboratory research to standard medical practice. Participation means access to treatments that are not yet available outside the trial.

Clinical trials are not experiments on unknowing subjects. Participation is always voluntary, always informed, and always governed by strict ethical and legal requirements. Before joining a trial, you must go through an informed consent process that explains exactly what is being tested, what the known risks are, what your rights are, and what participation will involve in practical terms.

You can withdraw from a trial at any time, for any reason, without affecting your access to other care. Withdrawing does not mean you have failed the trial or let anyone down. Your standard care continues regardless of whether you participate.

Why should I consider a clinical trial before all other options are exhausted?

The belief that clinical trials are something to try when everything else has failed is persistent and harmful. Many trials specifically require that participants have not yet received certain standard treatments. Waiting until standard treatment has been exhausted can mean you are no longer eligible for trials you might have joined earlier.

Trials at Phase II and Phase III stages are testing treatments that have already shown promising results in earlier research. These are not long shots. They are treatments with enough evidence behind them to justify large-scale testing. Joining one can mean access to something that will become standard care in a few years, today.

Trials also offer intensive monitoring and specialist oversight that can itself be beneficial, regardless of whether the treatment being tested turns out to be the right one for you.

What do the different trial phases mean?

Phase I trials test a new treatment in a small group of people, primarily to establish safety and dosing. These carry the most uncertainty and are usually only appropriate for people who have exhausted other options.

Phase II trials test whether the treatment works and continue to assess safety in a larger group. There is meaningful evidence of potential benefit at this stage.

Phase III trials compare the new treatment to the current standard treatment in a large group of people. These are the trials most likely to be relevant if you are currently undergoing treatment. Being randomised to the control arm means receiving standard of care, not a placebo.

Phase IV trials happen after a treatment has been approved. They monitor long-term effects and gather data on how the treatment performs in broader populations.

How do I find clinical trials in Australia?

The Australian and New Zealand Clinical Trials Registry (ANZCTR) at anzctr.org.au lists trials registered in Australia and New Zealand. You can search by condition, location, and trial status. The registry is publicly accessible and free to use.

ClinicalTrials.gov at clinicaltrials.gov is the United States registry but lists many trials with Australian sites. Some trials recruiting internationally will have participating hospitals in Australian capital cities even if the trial is based overseas.

To search effectively, use general terms rather than specific condition names. Search for the broad type of illness and look for trials listed as "recruiting" in your state or territory. Each listing will show the eligibility criteria, what the trial involves, the locations where it is running, and a contact person you can call for more information before making any decision.

Your specialist or a specialist nurse may also be able to check trial databases on your behalf or contact trial coordinators directly. Ask them to do this if navigating the registries yourself is difficult.

Am I eligible and when should I look into a trial?

Eligibility for clinical trials is specific. Many trials require that participants meet criteria around age, stage of illness, specific biomarkers, and treatment history. Some trials require that you have received at least one prior line of treatment. Others require that you have not received certain treatments at all.

Treatment history is one of the most common reasons people become ineligible for trials they might otherwise have qualified for. If there is a trial that looks relevant, it is worth understanding whether your current treatment plan affects eligibility before proceeding with that plan, not after.

This is not about delaying necessary treatment. It is about making sure the full picture is considered before treatment decisions are made. A specialist who is aware of available trials can factor that into their recommendations.

What does taking part in a trial actually involve?

Every trial is different, but most involve regular clinic visits, blood tests, scans, and assessments. Some trials require in-person visits more frequently than standard treatment. Others can be managed at your usual treating hospital. A small number involve travel to specialist centres.

Before consenting to join a trial, ask the trial coordinator what participation will look like week to week. Ask about time commitment, travel requirements, whether your carer can attend appointments with you, and whether any costs associated with participation are covered or reimbursed.

Trial teams are usually very well staffed and accessible. Participants typically have a named contact person, often a research nurse or trial coordinator, who manages their care within the trial and is available for questions. This level of support can itself be valuable.

What questions should I ask my medical team about trials?

You do not need to have researched a specific trial to start this conversation. These questions are a reasonable starting point.

1. Are there any clinical trials currently recruiting that might be relevant to my diagnosis?
2. Would any of my current or planned treatments affect my eligibility for trials?
3. Can someone on the team check the trial registries for open trials in my area?
4. If I wanted to seek a second opinion at a tertiary centre that runs more trials, could you help arrange that?

What is informed consent and what are my rights?

Before joining any trial, you will go through a formal informed consent process. You will be given a plain-language information statement explaining what the trial is testing, what is known and unknown about the treatment, what will happen to you if you participate, what your rights are, and who to contact with questions or concerns.

Read this document carefully. Ask questions about anything you do not understand. You are not expected to decide on the day. Take the document home, read it again, and discuss it with people you trust before signing.

Signing the consent form is not a commitment you cannot leave. You can withdraw at any time. Participation is always voluntary. Declining to participate or withdrawing mid-trial does not affect the standard of care you receive outside the trial.